The present invention relates to an electric spark wire cutting machine with high/low speed walking thread used for processing workpiece, which comprises a bed body provided with a lower wire frame, a standing pole provided with an upper wire frame and a thread transporting structure, and the thread transporting structure comprises an insulated pedestal, a pulse power supply, a plurality of guide wheels of the electrode threads and two groups of thread storing drums, wherein, the insulated pedestal is positioned on the bed body, and the anode of the pulse power supply is communicated with the electrode thread through a conductive carbon block, and the cathode is connected with the workpiece positioned on the insulated pedestal. The guide wheels are respectively arranged on the upper and lower thread frames to hold guide and support for the electrode threads. Two groups of thread storing drums are respectively positioned on the bed body and the standing pole. The electric spark wire cutting machine of the present invention has no limitation for one way walking thread or double way walking thread, and the speed for walking threads has bigger elasticity. The copper (alloy) or molybdenum (alloy) thread, etc., can all be used as the electrode thread. The medium (processing liquid) has scope of choosing, and the applicable space for the thick and thin workpiece is big, and the feasibility for the processing of non-ferrous metal or black metal is high. The present invention has the advantages that: the present invention has open processing manner and simple manufacturing, which saves cost and is economical and practical.